export type PaymentStatus = "pending" | "paid" | "overdue" | "cancelled";

export interface Invoice {
  id: string;
  clientEmail: string;
  clientName: string;
  subject: string;
  amount: number;
  currency: string;
  dueDate: string; // ISO date
  sentDate: string; // ISO date
  status: PaymentStatus;
  source: "gmail" | "outlook" | "manual";
  sourceThreadId?: string;
  lastFollowUpDate?: string;
  followUpCount: number;
  followUpSchedule: number[]; // days after sent: default [7, 14, 30]
  notes: string;
  paymentMethod?: "stripe" | "paypal" | "bank" | "other";
  paymentDate?: string;
  createdAt: string;
  updatedAt: string;
}

export interface Client {
  email: string;
  name: string;
  totalInvoiced: number;
  totalPaid: number;
  totalOverdue: number;
  invoiceCount: number;
}

export interface DashboardStats {
  totalOutstanding: number;
  totalPaid: number;
  totalOverdue: number;
  overdueCount: number;
  pendingCount: number;
  paidCount: number;
}

export interface Settings {
  followUpDays: number[];
  defaultCurrency: string;
  enableAutoDetect: boolean;
  enableFollowUpGeneration: boolean;
  userName: string;
  userEmail: string;
  paypalEmail?: string;
  stripeAccountId?: string;
}

export const DEFAULT_SETTINGS: Settings = {
  followUpDays: [7, 14, 30],
  defaultCurrency: "USD",
  enableAutoDetect: true,
  enableFollowUpGeneration: true,
  userName: "",
  userEmail: "",
};